US 4,071,866 AGranted

Disc recorder drive follower assembly

AssigneeSycor, Inc.

InventorOtto R. Butsch

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Abstract

A drive follower assembly for a disc recorder of the type including a frame supporting a lead screw and a guide rod positioned in vertically spaced, parallel relation to the load screw is disclosed. The drive follower includes a one-piece carriage defining a longitudinal bore. A first, hollow, cylindrical, internally threaded follower is disposed within the bore and held against rotation and longitudinal movement relative to the body. A second, internally threaded adjustment member is loosely held within the bore and engaged by the lead screw. A coil spring is positioned between the follower member and the adjustment member to provide a snug fit on the lead screw and prevent decoupling. Provision is made for holding the adjustment member against rotation relative to the body yet permitting relative rotation for adjusting the initial preload of the spring.

Claims19

Dependent claims

A head carriage for a disc recorder of the type including a frame supporting a lead screw by which said carriage is translated and a guide rod positioned in vertically spaced, parallel relation to the lead screw, said head carriage comprising:

a one-piece body defining a longitudinal bore dimensioned greater than the lead screw and including a stop at one end, said body further defining a glide passage dimensioned to receive the guide rod;
an internally threaded follower held within said bore and threadably engaged by the lead screw, said follower contacting the stop at one end and held against rotation relative to said body;
an internally threaded adjustment member disposed within said bore longitudinally spaced from said follower and threadably engaged by said lead screw;
a spring positioned between said follower and said adjustment follower, biasing said follower and said adjustment member apart to prevent backlash;
and
manually shiftable means carried by said body and engaging said adjustment member for normally holding said adjustment member against rotation relative to said carriage on said lead screw and being shiftable for permitting rotation of said adjustment member on said lead screw towards and away from said follower to adjust the spring preload.

3 more elements

A drive for the head of a disc recorder of the type using a flexible disc and including a frame, said drive comprising:

a lead screw supported by said frame;
a guide rail supported by said frame in spaced, parallel relationship to said lead screw;
a carriage means engaged by said lead screw to be translated thereby for supporting the head, said carriage means comprising:
a one-piece, molded body having a bore through which said lead screw extends and glide means for riding on said guide rail;
a first hollow member defining an internally threaded passage held within said bore, said first member threadably engaging said lead screw so as to be translated by said lead screw;
a second hollow member freely rotatably within said bore for movement towards and away from said first member, said second member being internally threaded and threadably engaging said lead screw to be translated thereby;
resilient biasing means engaging said first member and said second member for biasing said members apart to compensate for backlash between said internally threaded member and said lead screw;
and
anti-rotation means carried by said body and engaging said second member for preventing rotation of said second member relative to said body, said anti-rotation means being shiftable to a position permitting rotation of said second member on the lead screw towards and away from said first members.

6 more elements

Dependencies are inferred from the claim text.